Wireless headset



FIG. 1 is a rear view of a wireless headset showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is an elevated front, right perspective view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top view thereof. 

The ornamental design for a wireless headset, as substantially shown and described. 